drm/amd/display: Populate hostvm parameter before DML calculation (82df77ae) · Commits · 戴 / test

[Why] If the system does not have hostvm enabled, disabling it for DML validation will allow more modes to pass at lower voltage levels. [How] When initializing HostVM save state to hubbub and read back when populating DML pipes from context. Signed-off-by:

Sung Lee <sung.lee@amd.com> Acked-by:

Bindu Ramamurthy <bindu.r@amd.com> Signed-off-by:

Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -99,6 +99,8 @@ void dcn21_dchvm_init(struct hubbub *hubbub)

		//Poll until HOSTVM_PREFETCH_DONE = 1
		REG_WAIT(DCHVM_RIOMMU_STAT0, HOSTVM_PREFETCH_DONE, 1, 5, 100);

		hubbub->riommu_active = true;
		}
		}

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1886,7 +1886,7 @@ static int dcn21_populate_dml_pipes_from_context(

		for (i = 0; i < pipe_cnt; i++) {

		pipes[i].pipe.src.hostvm = 1;
		pipes[i].pipe.src.hostvm = dc->res_pool->hubbub->riommu_active;
		pipes[i].pipe.src.gpuvm = 1;
		}

drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -157,6 +157,7 @@ struct hubbub_funcs {
		struct hubbub {
		const struct hubbub_funcs *funcs;
		struct dc_context *ctx;
		bool riommu_active;
		};

		#endif

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